How I Use It
I did not use this in my own class - but I helped a teacher use it in their classroom. She read the first chapter of the book to them and explained how they were going to add to the book. Students were then given time to write (type). The next day they read other student's work and voted on the best "next" chapter. She then assigned the writing for HW. She did this for the next 4 weeks until they had a 6 chapter book.
Speaking with the students they loved the challenge of writing well enough to be the "winner". It was a little disappointing that the book had to be purchased at the end (they did not choose to buy it) - but I also understand the company needs to make money in some way.